公开(公告)号：US08390273B2

公开(公告)日：2013-03-05

申请号：US12862483

申请日：2010-08-24

申请人： William E. Grose ,  Teuta K. Williams ,  Philomena C. Brady ,  Bala Krishnan D. Achie ,  Vikram J. Mani

发明人： William E. Grose ,  Teuta K. Williams ,  Philomena C. Brady ,  Bala Krishnan D. Achie ,  Vikram J. Mani

IPC分类号： G01B7/14 ,  G01R33/025

CPC分类号： G01P3/481

摘要： Anti-lock and intelligent braking systems have become ubiquitous in modern vehicles, which employ wheel speed sensors or WSSs. These WSSs generally uses current-domain signals (transmitted through power wires) to reduce the size of the vehicle's wiring harness, but because a vehicle is an inherently noisy environment, mixed signal circuit or MSC (used to decode these signals for a microcontroller) should be able to filter out or compensate for noise. However, traditional MSCs have been plagued with problems, partly due to errors in time base measurement due to noise (as well as other factors). Here, an MSC is provided that accurately calculates a wheel speed pulse width (which is used for time base measurements) by observing the wheel speed pulse as it passes through several thresholds.

摘要翻译： 现代车辆采用车轮速度传感器或WSS，防抱死和智能制动系统已经普遍存在。 这些WSS通常使用电流域信号（通过电力线传输）来减小车辆线束的尺寸，但是由于车辆是固有的噪声环境，所以混合信号电路或MSC（用于为微控制器解码这些信号）应该 能够滤除或补偿噪声。 然而，传统的MSC已经遇到问题，部分原因是由于噪声（以及其他因素）导致的时基测量误差。 这里，通过在通过多个阈值时观察车轮速度脉冲来提供MSC，其准确地计算车轮速度脉冲宽度（用于时基测量）。

公开(公告)号：US20120051492A1

公开(公告)日：2012-03-01

申请号：US12862483

申请日：2010-08-24

申请人： William E. Grose ,  Teuta K. Williams ,  Philomena C. Brady ,  Bala Krishnan D. Achie ,  Vikram J. Mani

发明人： William E. Grose ,  Teuta K. Williams ,  Philomena C. Brady ,  Bala Krishnan D. Achie ,  Vikram J. Mani

IPC分类号： G04F10/04

CPC分类号： G01P3/481

摘要： Anti-lock and intelligent braking systems have become ubiquitous in modern vehicles, which employ wheel speed sensors or WSSs. These WSSs generally uses current-domain signals (transmitted through power wires) to reduce the size of the vehicle's wiring harness, but because a vehicle is an inherently noisy environment, mixed signal circuit or MSC (used to decode these signals for a microcontroller) should be able to filter out or compensate for noise. However, traditional MSCs have been plagued with problems, partly due to errors in time base measurement due to noise (as well as other factors). Here, an MSC is provided that accurately calculates a wheel speed pulse width (which is used for time base measurements) by observing the wheel speed pulse as it passes through several thresholds.

摘要翻译： 现代车辆采用车轮速度传感器或WSS，防抱死和智能制动系统已经普遍存在。 这些WSS通常使用电流域信号（通过电力线传输）来减小车辆线束的尺寸，但是由于车辆是固有的噪声环境，所以混合信号电路或MSC（用于为微控制器解码这些信号）应该 能够滤除或补偿噪声。 然而，传统的MSC已经遇到问题，部分原因是由于噪声（以及其他因素）导致的时基测量误差。 这里，通过在通过多个阈值时观察车轮速度脉冲来提供MSC，其准确地计算车轮速度脉冲宽度（用于时基测量）。

公开(公告)号：US08022686B2

公开(公告)日：2011-09-20

申请号：US12436344

申请日：2009-05-06

申请人： Wei Lu ,  Benjamin L. Amey ,  Teuta K. Williams

发明人： Wei Lu ,  Benjamin L. Amey ,  Teuta K. Williams

IPC分类号： G05F3/16 ,  G05F1/46

CPC分类号： G05F3/30 ,  Y10S323/901

摘要： An apparatus is provided. The apparatus comprises a reference circuit and a startup circuit. The reference circuit is adapted to provide a startup current, while the startup circuit receives the startup current and outputs an output voltage. The startup circuit includes a current mirror, a first NMOS transistor, a second NMOS transistor, diodes, and a third NMOS transistor, and a control circuit. The first and second NMOS transistors are coupled to the current mirror at their sources and are coupled to one another and to the reference circuit at their gates. The diodes are coupled between the gate of the second NMOS transistor and the source of the second NMOS transistor, and the third NMOS transistor is coupled to the source of the second NMOS transistor at its gate (which also provides the output voltage at its source). The control circuit is then coupled to the drains of the first and second NMOS transistors.

摘要翻译： 提供了一种装置。 该装置包括参考电路和启动电路。 参考电路适于提供启动电流，而启动电路接收启动电流并输出输出电压。 启动电路包括电流镜，第一NMOS晶体管，第二NMOS晶体管，二极管和第三NMOS晶体管，以及控制电路。 第一和第二NMOS晶体管在其源极处耦合到电流镜，并在它们的栅极处彼此耦合到参考电路。 二极管耦合在第二NMOS晶体管的栅极和第二NMOS晶体管的源极之间，并且第三NMOS晶体管在其栅极处耦合到第二NMOS晶体管的源极（其也在其源极处提供输出电压） 。 然后将控制电路耦合到第一和第二NMOS晶体管的漏极。

公开(公告)号：US20100283448A1

公开(公告)日：2010-11-11

申请号：US12436344

申请日：2009-05-06

申请人： Wei Lu ,  Benjamin L. Amey ,  Teuta K. Williams

发明人： Wei Lu ,  Benjamin L. Amey ,  Teuta K. Williams

IPC分类号： G05F3/16

CPC分类号： G05F3/30 ,  Y10S323/901

摘要： An apparatus is provided. The apparatus comprises a reference circuit and a startup circuit. The reference circuit is adapted to provide a startup current, while the startup circuit receives the startup current and outputs an output voltage. The startup circuit includes a current mirror, a first NMOS transistor, a second NMOS transistor, diodes, and a third NMOS transistor, and a control circuit. The first and second NMOS transistors are coupled to the current mirror at their sources and are coupled to one another and to the reference circuit at their gates. The diodes are coupled between the gate of the second NMOS transistor and the source of the second NMOS transistor, and the third NMOS transistor is coupled to the source of the second NMOS transistor at its gate (which also provides the output voltage at its source). The control circuit is then coupled to the drains of the first and second NMOS transistors.

摘要翻译： 提供了一种装置。 该装置包括参考电路和启动电路。 参考电路适于提供启动电流，而启动电路接收启动电流并输出输出电压。 启动电路包括电流镜，第一NMOS晶体管，第二NMOS晶体管，二极管和第三NMOS晶体管，以及控制电路。 第一和第二NMOS晶体管在其源极处耦合到电流镜，并在它们的栅极处彼此耦合到参考电路。 二极管耦合在第二NMOS晶体管的栅极和第二NMOS晶体管的源极之间，并且第三NMOS晶体管在其栅极处耦合到第二NMOS晶体管的源极（其也在其源极处提供输出电压） 。 然后将控制电路耦合到第一和第二NMOS晶体管的漏极。